Displaying And Maintaining The Dhcp Server - 3Com 4210 9-Port Configuration Manual

If a DHCP server is configured to ignore Option 82, after the DHCP server receives packets containing
Option 82, the DHCP server will not add Option 82 into the responses when assigning IP addresses and
other configuration information to the clients.
Follow these steps to configure the DHCP server to process Option 82:
To do...
Enter system view
Enable the DHCP server to
process Option 82

Displaying and Maintaining the DHCP Server

To do...
Display the statistics on IP
address conflicts
Display lease expiration
information
Display the free IP addresses
Display information about
address binding
Display the statistics on a
DHCP server
Display information about
DHCP address pool tree
Clear IP address conflict
statistics
Clear dynamic address binding
information
Clear the statistics on a DHCP
server
Executing the save command will not save the lease information on a DHCP server to the flash memory.
Therefore, the configuration file contains no lease information after the DHCP server restarts or you
clear the lease information by executing the reset dhcp server ip-in-use command. In this case, any
lease-update requests will be denied, and the clients must apply for IP addresses again.
Use the command...
system-view
dhcp server relay
information enable
Use the command...
display dhcp server conflict { all | ip
ip-address }
display dhcp server expired { ip ip-address |
pool [ pool-name ] | interface [ interface-type
interface-number ] | all }
display dhcp server free-ip
display dhcp server ip-in-use { ip ip-address |
pool [ pool-name ] | interface [ interface-type
interface-number ] | all }
display dhcp server statistics
display dhcp server tree { pool [ pool-name ] |
interface [ interface-type interface-number ] |
all }
reset dhcp server conflict { all | ip ip-address }
reset dhcp server ip-in-use { ip ip-address |
pool [ pool-name ] | interface [ interface-type
interface-number ] | all }
reset dhcp server statistics
2-25
Remarks
—
Optional
By default, the DHCP server
supports Option 82.
Remarks
Available in
any view
Available in
user view